What happened
The pilot was approaching a load truck for a landing operation when environmental conditions suddenly deteriorated. As the aircraft drew near the ground, loose debris began to blow around in the vicinity of the helicopter. This flying debris struck the tail rotor assembly, causing immediate mechanical damage.
Following the impact, the pilot attempted to maintain directional control but found that left pedal input produced no response. The loss of anti-torque capability caused the helicopter to enter an uncontrolled spin to the right. Recognizing the imminent danger, the pilot maneuvered the aircraft away from the load truck to avoid further ground contact or collision with the equipment.
Despite these efforts, the damage was irrecoverable. The helicopter descended rapidly and crashed to the ground. The incident highlights the vulnerability of tail rotors to foreign object debris during low-altitude operations.
The investigation
Post-acc examination of the wreckage confirmed that the tail rotor had sustained significant damage. Investigators determined that the damage was consistent with impact from flying debris encountered during the final approach phase. No other mechanical failures were identified prior to the debris strike.
Findings
The primary factor in this accident was the physical damage to the tail rotor system caused by external debris. This damage resulted in a complete loss of tail rotor control authority. The pilot's inability to counteract the torque-induced yaw led directly to the loss of control and subsequent crash.